| Hackettstown to Ukiah (California) | 2,530.71 mi (4,072.79 km) |
| Hackettstown to Union (Missouri) | 874.79 mi (1,407.84 km) |
| Hackettstown to Union City (California) | 2,505.23 mi (4,031.77 km) |
| Hackettstown to Union City (Georgia) | 733.00 mi (1,179.65 km) |
| Hackettstown to Union City (New Jersey) | 41.92 mi (67.46 km) |
| Hackettstown to Union City (Tennessee) | 824.99 mi (1,327.69 km) |
| Hackettstown to Union Hill-Novelty Hill (Washington) | 2,344.84 mi (3,773.66 km) |
| Hackettstown to Union Park (Florida) | 923.10 mi (1,485.59 km) |
| Hackettstown to Uniondale (New York) | 65.08 mi (104.74 km) |
| Hackettstown to Universal City (Texas) | 1,531.27 mi (2,464.33 km) |
| Hackettstown to University (Florida) | 982.43 mi (1,581.08 km) |
| Hackettstown to University City (Missouri) | 836.18 mi (1,345.69 km) |
| Hackettstown to University Heights (Ohio) | 351.64 mi (565.91 km) |
| Hackettstown to University of California-Santa Barbara (California) | 2,476.06 mi (3,984.83 km) |
| Hackettstown to University Park (Texas) | 1,329.63 mi (2,139.84 km) |
